Vehicle cooling mechanism

Abstract

A vehicle cooling mechanism includes a first radiator configured to cool a battery of a vehicle, a second radiator configured to cool a power conversion device that converts electric power supplied from the battery and electric power supplied to the battery, and an air guide duct portion configured to guide outside air from an opening portion provided in a front end portion of the vehicle to the first radiator and the second radiator. The first radiator is arranged above the second radiator. At least a part of the second radiator is arranged so as to overlap the opening portion as viewed from a front side of the vehicle. An upper end portion of the second radiator is positioned above an upper end portion of the opening portion. A lower end portion of the second radiator is positioned below the upper end portion of the opening portion.

The invention claimed is: 
     
       1. A vehicle cooling mechanism comprising:
 a first radiator configured to cool a battery of a vehicle; 
 a second radiator configured to cool a power conversion device that converts electric power supplied from the battery and electric power supplied to the battery; and 
 an air guide duct portion configured to guide outside air from an opening portion provided in a front end portion of the vehicle to the first radiator and the second radiator, 
 wherein the first radiator is arranged above the second radiator, 
 wherein at least a part of the second radiator is arranged so as to overlap the opening portion as viewed from a front side of the vehicle, 
 wherein an upper end portion of the second radiator is positioned above an upper end portion of the opening portion, and 
 wherein a lower end portion of the second radiator is positioned below the upper end portion of the opening portion. 
 
     
     
       2. The vehicle cooling mechanism according to  claim 1 ,
 wherein an area of the first radiator is larger than an area of the second radiator as viewed from the front side of the vehicle. 
 
     
     
       3. The vehicle cooling mechanism according to  claim 2 ,
 wherein a width of the second radiator in a front-rear direction is larger than a width of the first radiator in the front-rear direction. 
 
     
     
       4. The vehicle cooling mechanism according to  claim 1 ,
 wherein the air guide duct portion includes
 a lower duct portion extending in a tubular shape from an opening portion side toward a second radiator side, 
 an intermediate duct portion, whose air guide area decreases from a lower side toward an upper side, positioned above the lower duct portion, and 
 an upper duct portion positioned above the intermediate duct portion and facing the first radiator. 
 
 
     
     
       5. The vehicle cooling mechanism according to  claim 1 ,
 wherein the first radiator and the second radiator are arranged so as to overlap each other in the front-rear direction as viewed from a side of the vehicle. 
 
     
     
       6. The vehicle cooling mechanism according to  claim 1 ,
 wherein a guard member is provided in front of the second radiator, and 
 wherein the guard member includes a windbreak portion covering a gap between the first radiator and the second radiator in an upper-lower direction. 
 
     
     
       7. The vehicle cooling mechanism according to  claim 6 ,
 wherein the guard member includes a frame body and a guard portion in which a bar member is arranged in a lattice shape inside the frame body, and 
 wherein an upper end portion of the guard portion is at the same height as the upper end portion of the opening portion, or is higher than the upper end portion of the opening portion and lower than the upper end portion of the second radiator. 
 
     
     
       8. The vehicle cooling mechanism according to  claim 1 ,
 wherein an air conditioner condenser and a fan that is arranged further rearward of the air conditioner condenser and arranged so as to straddle the first radiator and the second radiator in the upper-lower direction are provided behind the first radiator and the second radiator. 
 
     
     
       9. The vehicle cooling mechanism according to  claim 8 ,
 wherein the fan is a shroud fan including a shroud, 
 wherein the air conditioner condenser is fixed to the shroud, and 
 wherein the shroud is fixed to a vehicle body.